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qfedu-qt-level
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1
.gitignore vendored
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@ -88,4 +88,3 @@ compile_commands.json
*.out *.out
*.app *.app
.vscode

73
qtdemo01/.gitignore vendored
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@ -1,73 +0,0 @@
# This file is used to ignore files which are generated
# ----------------------------------------------------------------------------
*~
*.autosave
*.a
*.core
*.moc
*.o
*.obj
*.orig
*.rej
*.so
*.so.*
*_pch.h.cpp
*_resource.rc
*.qm
.#*
*.*#
core
!core/
tags
.DS_Store
.directory
*.debug
Makefile*
*.prl
*.app
moc_*.cpp
ui_*.h
qrc_*.cpp
Thumbs.db
*.res
*.rc
/.qmake.cache
/.qmake.stash
# qtcreator generated files
*.pro.user*
# xemacs temporary files
*.flc
# Vim temporary files
.*.swp
# Visual Studio generated files
*.ib_pdb_index
*.idb
*.ilk
*.pdb
*.sln
*.suo
*.vcproj
*vcproj.*.*.user
*.ncb
*.sdf
*.opensdf
*.vcxproj
*vcxproj.*
# MinGW generated files
*.Debug
*.Release
# Python byte code
*.pyc
# Binaries
# --------
*.dll
*.exe

35
qtdemo01/main.cpp
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#include "widget.h"
#include "mywidget2.h"
#include "widget3.h"
#include <QApplication>
#include <QScreen>
#include <QDebug>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
// Widget w;
// 设置窗口的标题、初始大小、固定的最大宽和高
// w.setWindowTitle("标题");
// w.resize(1200,900);
// w.setFixedSize(600,400);
// 获取主屏幕
// QScreen *desktop = QApplication::primaryScreen();
// QRect screenGeometry = desktop->geometry();
// int screenWidth = screenGeometry.width();
// int screenHeight = screenGeometry.height();
// // 获取屏幕信息
// qDebug() << "屏幕宽度：" << screenWidth;
// qDebug() << "屏幕高度：" << screenHeight;
// MyWidget2 w2; // 修改为新增的 MyWidget2 类
Widget3 w3;
w3.show();
return a.exec();
}

26
qtdemo01/mywidget2.cpp
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@ -1,26 +0,0 @@
#include "mywidget2.h"
MyWidget2::MyWidget2(QWidget *parent) : QWidget(parent)
{
// 设置窗口的大小
resize(800,640);
setWindowTitle("第二个窗口");
mBtn = new QPushButton("提取输入的内容",this);
// mEdit = new QLineEdit(this);
mEdit = new QLineEdit;
mEdit->setParent(this);
mEdit->setFixedSize(200,50);
mEdit->move(10,10);
mBtn->setFixedSize(200,100);
mBtn->move(10,70);
connect(mBtn,&QPushButton::clicked,this,&MyWidget2::getText);
}
void MyWidget2::getText()
{
// 绑定
qDebug()<<mEdit->text();
}

27
qtdemo01/mywidget2.h
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@ -1,27 +0,0 @@
#ifndef MYWIDGET2_H
#define MYWIDGET2_H
#include <QWidget>
#include <QPushButton>
#include <QLineEdit> // 单行输入框
#include <QDebug>
class MyWidget2 : public QWidget
{
Q_OBJECT
public:
explicit MyWidget2(QWidget *parent = nullptr);
public:
void getText(); // 自定义成员函数
private:
QPushButton *mBtn;
QLineEdit *mEdit;
signals:
};
#endif // MYWIDGET2_H

36
qtdemo01/qtdemo01.pro
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@ -1,36 +0,0 @@
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
mywidget2.cpp \
student.cpp \
teacher.cpp \
widget.cpp \
widget3.cpp
HEADERS += \
mywidget2.h \
student.h \
teacher.h \
widget.h \
widget3.h
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

6
qtdemo01/student.cpp
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#include "student.h"
Student::Student(QObject *parent) : QObject(parent)
{
}

18
qtdemo01/student.h
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@ -1,18 +0,0 @@
#ifndef STUDENT_H
#define STUDENT_H
#include <QObject>
class Student : public QObject
{
Q_OBJECT
public:
explicit Student(QObject *parent = nullptr);
signals:
void sleep(); // 信号(函数)不需要实现
void sleep(const QString &msg,int n);
};
#endif // STUDENT_H

15
qtdemo01/teacher.cpp
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@ -1,15 +0,0 @@
#include "teacher.h"
Teacher::Teacher(QObject *parent) : QObject(parent)
{
}
void Teacher::wake_up(){
qDebug() << "请睡觉的学生站起来，出去跑两圈";
}
void Teacher::wake_up(const QString &msg)
{
qDebug() << "学生因为 "<<msg<<" 原因上课睡觉了";
}

19
qtdemo01/teacher.h
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@ -1,19 +0,0 @@
#ifndef TEACHER_H
#define TEACHER_H
#include <QObject>
#include <QDebug>
class Teacher : public QObject
{
Q_OBJECT
public:
explicit Teacher(QObject *parent = nullptr);
public slots:
void wake_up();
void wake_up(const QString &msg); // 信号带参数，处理的槽函数也要有参数，且类型保持一致
};
#endif // TEACHER_H

95
qtdemo01/widget.cpp
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@ -1,95 +0,0 @@
#include "widget.h"
// : Qwidget(parent) 初始化列表，调用父类构造函数
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
// 初始化设置窗口的标题、大小和固定
// setWindowTitle("按钮板");
// // resize(400,300);
// setFixedSize(400, 190);
// 添加按钮
// 不要将对象存在栈区，应该在堆区创建
// QPushButton *btn = new QPushButton("点我啊",this);
// QPushButton *btn = new QPushButton;
// btn->setParent(this);
// btn->setText("点一下");
// btn->setFixedSize(200, 100);
// btn->move(100, 50); // 向右移动 100, 向下移动 50
// 创建 9 个按钮，三行三列，每个按钮的大小为 120,50
// 每个按钮之间的间隔为 10
// int w = 120, h = 50, space = 10;
// QVector<QPushButton *> vbs; // 使用指针类型存储按钮
// for (int i = 0; i < 3; i++)
// { // 修改行范围
// for (int j = 0; j < 3; j++)
// { // 修改列范围
// int btnNumber = i + j * 3 + 1;
// // QPushButton *btn = new QPushButton(QString::number(btnNumber), this);
// QPushButton *btn = new QPushButton;
// btn->setText(QString::number(btnNumber));
// btn->setParent(this);
// btn->setFixedSize(w, h);
// btn->move((space + w) * i + space, (space + h) * j + space);
// vbs.append(btn); // 将按钮添加到向量中
// }
// }
// 方法二
// int w=120, h =50,space=10;
// QVector<QPushButton *> vbs;
// for(int i=0;i <9; i++){
// // QString::number(int) 将整数转化为QString字符串
// QPushButton *btn=new QPushButton(QString::number(i+1), this);
// btn->setFixedSize(w,h);
// // 第一行
// int row = i/3;
// int col= i % 3;
// btn->move((space+w)*col+space,
// (space+h)*row+space);
// vbs.append(btn); // 将按钮添加到向量中
// }
resize(800,640);
setMaximumSize(900,700); // 窗口最大尺寸
move(0,0);
QPushButton *btn = new QPushButton("关闭",this);
btn->setFixedSize(120,50);
btn->move(10,10);
// 当前类对象 QPushButton 的点击事件感兴趣
// 使用 connect() 进行绑定到当前窗口的 close()
// 发送者和接受者都是 QObject 类对象的指针
// Qt5 的信号绑定槽函数的方式
connect(btn,&QPushButton::clicked,this,&Widget::close);
QPushButton *maxBtn = new QPushButton("最大化",this);
maxBtn->setFixedSize(120,50);
maxBtn->move(10,70);
// 绑定的槽函数是自定义的
connect(maxBtn,&QPushButton::clicked,this,&Widget::toggleShow);
}
void Widget::toggleShow() // 自定义槽函数
{
// qDebug() 引入 <QDebug> 头文件
qDebug()<<"show or hide"<<this->isMaximized() <<endl;
if(isMaximized())
{
showNormal(); // 槽函数可以作为成员函数使用
}
else{
showMaximized();
}
}
Widget::~Widget()
{
}

19
qtdemo01/widget.h
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@ -1,19 +0,0 @@
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QPushButton>
#include <QDebug>
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
public:
void toggleShow();
};
#endif // WIDGET_H

66
qtdemo01/widget3.cpp
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@ -1,66 +0,0 @@
#include "widget3.h"
Widget3::Widget3(QWidget *parent) : QWidget(parent)
{
setWindowTitle("自定义信号和槽");
resize(800,640);
stu = new Student();
stu->setParent(this);
techr = new Teacher(this);
// 绑定无参信号
void(Student:: *sleep1)() = &Student::sleep;
void(Teacher:: *wakeup1)() = &Teacher::wake_up;
connect(stu,sleep1,techr,wakeup1);
// 绑定有参的信号和槽函数
void(Student:: *sleep2)(const QString &,int n) = &Student::sleep;
void(Teacher:: *wakeup2)(const QString &) = &Teacher::wake_up;
connect(stu,sleep2,techr,wakeup2);
// 手动发送一个信号
// emit stu->sleep();
// 点击按钮发送学生睡觉的信号
QPushButton *btn = new QPushButton("我睡会",this);
btn->resize(120,50);
btn->move(20,20);
QPushButton *btn2 = new QPushButton("再睡会",this);
btn2->resize(120,50);
btn2->move(20,90);
edit = new QLineEdit(this);
edit->resize(300,50);
edit->move(20,160);
// 将一个信号绑定到另一个信号上，即发送另一个信号
// connect(btn,&QPushButton::clicked,stu,&Student::sleep);
// connect(btn,&QPushButton::clicked,this,&Widget3::to_sleep);
connect(btn, SIGNAL(clicked()) ,this,SLOT(to_sleep())); // QT4 的信号槽写法
// connect(btn2,&QPushButton::clicked,this,&Widget3::to_sleep2);
// Lambda表达式（匿名函数）
// connect(btn,&QPushButton::clicked,[&](){
// emit stu->sleep();
// void(Student:: *sleep1)() = &Student::sleep;
// void(Teacher:: *wakeup1)() = &Teacher::wake_up;
// disconnect(stu,sleep1,techr,wakeup1);
// });
connect(btn2,&QPushButton::clicked,[&](){
const QString msg = edit->text();
emit stu->sleep(msg,2);
});
}
void Widget3::to_sleep()
{
emit stu->sleep(); // 发送一个睡觉的信号
}
void Widget3::to_sleep2()
{
const QString &msg = edit->text();
emit stu->sleep(msg,2);
}

29
qtdemo01/widget3.h
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@ -1,29 +0,0 @@
#ifndef WIDGET3_H
#define WIDGET3_H
#include <QWidget>
#include <QPushButton>
#include <QLineEdit>
#include "student.h"
#include "teacher.h"
class Widget3 : public QWidget
{
Q_OBJECT
public:
explicit Widget3(QWidget *parent = nullptr);
public slots:
void to_sleep();
void to_sleep2();
private:
Student *stu;
Teacher *techr;
QLineEdit *edit; // 睡觉的原因
signals:
};
#endif // WIDGET3_H